Valve-stem guide for locomotives.



P. J. COLE. VALVE STEM GUIDE OB LOUOMOTIVBS. PPPPP 011m rmm 11110.30,1910.

993,651 Patented May 30, 1911.

3 SHEETS-SHEET 1.

F. J. COLB'.

VALVE STEM GUIDE FOR LOCOMOTIVES.

APPLICATION FILED D30. 30, 1910.

Patented May 30,

a BHBBTS-BHEBT 4.

FIG.3.

INVENTUI WITNESS 8 F. J. COLE.

VALVE aTBM GUIDE FOR LOCOMOTIVES.

APPLICATION FILED D120. 30, 1910.

993,651 Patented M730, 1911.

3 SHEETS-SHEET 3.

FRANCIS J. COLE, OF SCHENECTADY, NEW YORK.

VALVE-STEM GUIDE FOR LOCOMOTIVES.

Specification of Letters Patent.

Patented May 30, 1911.

Application filed December 80, 1910. Serial No; 600,098.

To all whom it may concern:

Be it known that I, FRANCIS J. Conn, of Schenectady, in the county ofSchenectady and State of New York, have invented a certain new anduseful Improvement in Valve-Stem Guides for Locomotives, of whichimprovement the following is a specification.

The object of my invention is to provide means for guiding the valvestems of locomotive engines fitted with Walsehaert or analogous outsidevalve gear, which shall be of simple and inexpensive construction andeasy application and repair, shall be self centering, and shall admit ofthe employment of a straight combination lever and insure substantiallateral stability in said lever.

The improvement claimed is hereinafter '20 fully set forth.

In the accompan ing drawings: Figure 1 is a side view, in e evation, ofso much of a locomotive engine as illustrates an application ofmyinvention; Fig. 2, a plan or to view, partly in section and on anenlarge scale, of the valve stem guide; Fig. 3, a vertical transversesection, on the line a a of Fig. 2; Fig. 4, a side view, in elevation;Fig. 5, a view, similar to Fig. 2, but illustrating a structuralmodification; Fig. 6, a Vertical transverse section, on the line b b ofFig. 5; Fig. 7, a side view, in elevation, of the structural modificzrion shown in Figs. 5 and 6; and, Fig. 8, a plan view, partly in section,illustrating a further structural modification.

Referring first to Figs. 1 to 4 inclusive, in the practice of myinvention, I provide a main body, or support, 1, having a head, 1, 40 onitsforward end, which abuts against the rear end of the valve chest, 2,said head serving, in the instance shown, as the rear cap or closure ofthe valve chest, and being provided with an annular flange orprojection, 1", which is finished truly on its periphcry and fits in acorresponding bore in the end of the valve chest, concentric with thevalve stem, 3, upon which the distribution valve, which may be of anysuitable known construction and is not herein shown, is secured. Theguide is thereby centered in the valve chest, and the valve stem passesthrough a properly packed stufiing box, 1,-

which may either be formed in the head, 1",

or, as shown in Fig. 8, in an independent valve chest cap, 1, surrour.bvsald head and fitting in a bore in the valve chest concentric with thevalve stem, similarly to the annular flange, 1', above specified.

A longitudinal slot or recess, 1, is formed centrally in the support, 1,at and extending inwardly from its rear end, for the passage of acombination lever, 4', which, as shown, is straight and not bifurcatedat its ends, and is connected, at its opposite ends, to a combinationlink, 5, and to a radius bar,

6, extending to an ordinary \Valschaert link, 11, or to a similarlyoperating member. The combination lever, 4., passes throu h a. centralslot in across head, 7, and is tted on and adapted to rock about theaxis of, a cross head pin, 7, which presents a central bearing for thecombination lever, and fits, on opposite sides thereof, in the jaws orside members of the cross head. The cross head, 7, is keyed on, orotherwise suitably secured to, the valve stem, 3. The cross head pin ispreferably, as shown, secured to the combination lever, as by a pin, 7",and adapted to rock, with the combination lever, in been ings in thecross head, formed by bushings 7, fixed therein. It will be obviousthat, ii referred, the cross head pin may be fixed. 1n the cross headand the combination lever journaled to rock on the fixed in.

The cross head, 7, is adapte to reciprocate in guides which aredetachably and ad-v justably connected to the support, 1, said guidescomprising a pair of lower guide bars, 8, of plate form, and a pair ofupper guide bars, 8, of angle'form, said up er and lower guide barsbeing secured to tie suport, 1, by bolts, 9, and nuts, 9. \Vear and lbstmotion between the cross head and guides may be taken'up, as, from timeto time, may become necessary or desirable, by means ofdetachableliners, 8", interposed between the upper and lower guide bars,diflerent thicknesses of which maybe used as the conditions of wear mayrequire. Q11 cups, 10, are connected to the uppcr gulde bars, for thepur ose of enabling the cross head to be proper y lubricated.

The structural modification shown in Figs. 5 to 7 inclusive, accords, inall cssential particulars, with the construction above described,differing therefrom only in that the guides are, in this instance,in-the form of longitudinal members, 8, which are made integral with thesupport, 1, and are grooved or channeled to fit the jaws of the crosshead, 7. This construction presents the advantage of being more simplethan that first described, but lacks that of adjustability to compensatewear of the parts.

I claim as my invention and desire to secure by Letters Patent:

1. In a guide mechanism for the valve stem of a locomotive outside valvegear, the

combination of a body or support, having an integral head on one end,adapted to abut against the valve chest, and a longitudinal centralrecess extending inwardly from its opposite end, lateral guide barsfixed to said support and a cross head fitting movably between saidguide bars, said cross head having a central slot for a valve gearcombination lever and being adapted for end connection to a valve stem.

2. In a guide mechanism for the valve stem of a locomotive outside valvegear, the combination of a body or support, having, on one end, anintegral head, adapted to abut against a valve chest and provided withan annular projection for centering the support in the valve chest, andhaving a longitudinal central. recess extending inwardly from itsopposite end, lateral guide bars fixed to said support, and a cross headfitting movably between said guide bars, said cross head having acentral slot for a valve gear combination lever and being adapted forend connection to a valve stem.

3. In a guide mechanism for the valve stem of a locomotive outside valvegear, the combination of a body or sup 30ft, having an integral head onone end, ac apted to abut against a valve chest, and a longitudinalcentral recess extending inwardly from its opposite end, lateral guidebars fixed to said support a cross head fitting movably be tween saidguide bars, said cross head having a central slot for a valve gearcombination lever and being adapted. for end connection to a valve stem,and detachable liners interposed bet-ween the cross head and guide bars.

4. In a guide mechanism for the valve stem of a locomotive outside valvegear, the combination of a body or support having an integral head onone end, adapted to abut against a valve chest, and a longitudinalcentral-recess extending inwardly from its opposite end, lateral guidebars fixed to said support, a cross head fitting movably between saidguide bars, said cross head having a central slot for a valve gearcombination lever and being adapted tor end connection to a valve stemand a pin fitting in hearings in the sides of the cross head and havingan intermediate bearing for-a combination lever.

5. In a guide mechanism for the valve stem of a locomotive outside valvegear, the combination of a body or support having an integral head onone end, adapted to abut against a valve chest, and a longitudinalcentral recess extending inwardly stem of a locomotive outside valvegear, the

combination of a body or support having an integral head on one end,adapted to abut against a valve chest, and a longitudinal cen-' tralrecess extending inwardly from its opposite end, upper and lower lateralguide bars adjustably connected to said support on opposite sides of thecentral recess thereof, and means for adjusting said guide bars towardand from each other.

FRANCIS J COLE. Witnesses S. W. TYLER, JOSHUA J. Jonas.

